Thermal-stress analysis and calculation of single and dual chip set double-sided circuit board based on three-dimensional finite element algorithm

Circuit World ◽  
2015 ◽  
Vol 41 (2) ◽  
pp. 49-54
Author(s):  
Lan Song ◽  
Yang Zhao ◽  
Yaoming Zhou ◽  
Haifei Xiang
Keyword(s):  
Finite Element ◽  
Temperature Field ◽  
Thermal Stress ◽  
Three Dimensional ◽  
Circuit Board ◽  
Content Type ◽  
Thermal Stress Field ◽  
Dimensional Finite Element ◽  
Three Dimensional Finite Element ◽  
Element Algorithm

Purpose – The purpose of this paper is to analyze and figure out the temperature field and thermal stress field with the calculation model of thermal insulation material and composite material. Design/methodology/approach – The paper adopted the three-dimensional finite element algorithm. Findings – The simulated results showed great shearing strength between the chipset and the printed circuit board. The position of chip exerts great influence on the distribution of temperature field and thermal stress field of circuit board. The reasonable distribution of chip will effectively reduce the temperature extremum and stress extremum of circuit board. Originality/value – The paper analyzes and presents a discussion of the problems relating to the density of electronic packaging. The analysis process and the method of the paper provide essential help in resolving electronic device heat problems.

scholarly journals Medical Imaging Diagnosis of Anterior Cruciate Ligament Injury Based on Intelligent Finite-Element Algorithm

2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Minzhuo Wang
Keyword(s):  
Finite Element ◽  
Anterior Cruciate Ligament ◽  
Anterior Cruciate Ligament Injury ◽  
Cruciate Ligament ◽  
Three Dimensional ◽  
Ligament Injury ◽  
Dimensional Finite Element ◽  
Anterior Cruciate ◽  
Three Dimensional Finite Element ◽  
Element Algorithm

A medical imaging method based on an intelligent finite-element algorithm was proposed to diagnose anterior cruciate ligament injury modeling better. CT three-dimensional finite-element modeling was used to predict the fixation points of the anterior cruciate ligament (ACL) femoral tunnel. In this study, 19 subjects were selected, including 11 males and 8 females. There were seven cases of the left knee and 12 cases of the right knee; all patients had sports injuries. The anatomical structure of a patient’s knee was transformed into a three-dimensional model using finite-element analysis software for segmentation. The models of the tibial plateau and lateral femoral condyle were retained. The results showed that the Lysholm score difference (D) between 6 months after surgery and 1 day before surgery was used as the dependent variable in the three-dimensional finite-element model of knee joint established by the software. Pearson’s correlation analysis was performed, and the difference P < 0.05 was statistically significant. The original image of the Dicom format obtained through CT scan is preprocessed in Mimics without any format conversion, which avoids the loss of information, saves more time, and reduces the workload. The definition of “threshold” is used to complete the extraction of bone contour and realize automation. The speed and accuracy of modeling are improved.

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